Abrading appliance



&p t. 27, was. K. H. BOWEN 2,131,309

ABRADING APPLIANCE Filed May 14, 1938 Ken/71% H Boa/@71 Patented Sept. 27, 1938 1 ABRADING APPLIANCE Kenneth H. Bowen, Auburn, N. Y., assignor to Oolumbian Rope Company, Auburn, N. Y., a 1 corporation of New York j Application May 14, 1938, Serial No. 3208117 1 6 Claims. (01. 51-195)..

' STATES OFFICE This invention relates to improvements in Fig. 3 is'Y-adiagrammatical illustration of the abrading appliances such as discs or wheels to apparatusused-in forming the web of fibres. which an abrasive material is applied and, par- Pads of the'type' adapted for thepurposes of ticularly, to a disc adapted to carry an abrasive illustrating :the present-invention are adapted to 5 material on its side surface, as distinguished have an abrasive material dusted or other- 5 from its peripheral surface. wise applied to their side faces, this operation One object of the invention is to provide a cirbeing known as the heading-up, of the pad. cular body adapted to function as an abrading In use, the coated face of the pad is pressed member, in the sense that it is coated with an against the work and the pad must possess a 1i) abrasive material, which member .can be procertain degree of resiliency or flexibility sothat l0 duced economically without detracting from its it will be capable of flexing laterally when pressed efiiciency under operating conditions. against the work. This flexing action, of course, Another'object is to provide a member of this imposes rather heavy and continuous strains on type formed of promiscuously associated fibres thepad' and is the determining factor, so far as 5 secured together in the form of a web with means concerns the life or length-of usefulness of the incorporated in the web to"facilitate handling pad, as the abrasive coating can always bere thereof; in the production of the member, in dn View Of this, e present D is that there is littl e,;if any, likelihood of the web made-up of a plurality of laminations'of fibres breaking or rupturing while being manipulated. ll, and each lamination has incorporated therego A still further object of the invention is to in a reinforcing member l2 which aids in pre provide an'abrading member of disc-like formaventing -disintegration of the respective lamination adapted to be flexed laterally in the use tions by'reason of the fact thatit tends to pre-. thereof, the abrasive being on the side face of vent separation of the fibres of thelaminationl, the disc, and which member will be of better In the preferred embodiment of the invention,

wear-resisting properties so far as concerns rethis reinforcing element'isinthe form of a sheet 9,5

sistance to disintegration'of the memberby the of fabric with the fibres H arranged on opposite strains imposed thereon by this lateral flexing sides thereof, and each lamination is formed :of action. r V p a circular blank of material of this nature cut -Mor'e specifically, the invention contemplates from 'a'web of such material. As illustrated in an abrading member composed of a plurality of Fig. 2, the web may-be of continuous formation laminations of fibres-preferably vegetable fibres, and, to facilitate handlingof the web: in the with each lamination comprising a reinforcing manufacture of the finished product, the fibres member, preferably in the form of a fabric sheet H are attached to the reinforcing fabric by havembedded in the lamination with the fibres dising certain of the fibres projecting through the posed on opposite sides of the fabric and with fabric. As illustrated more or less diagrammati- 5 portions or groups of the fibres projecting through cally in Fig. 3, the reinforcing fabric, with fibres. the reinforcing fabric, thisbeing the sole means on opposite faces thereof, is passed through what of attachment of the fibres to the fabric during is known in the industry as a needling machine,

a portion of the formation of'the member, or this machine comprising barbed needles l3 adapt- 40 until the material is treated with a binder by ed to be pushed or projected through the web 40 which the several laminations are secured toformed by the fabric and fibres, the barbs causgether in a unitary mass. ing small groups of the fibres to be pushed or- With these and other objects in view, the indrawn through the fabric from one side to the vention consists in certain details of construcother, so as to interlock the fibres with the fabric.

. tion and combinations and arrangements of This is more clearly illustrated in Fig. 2 where parts, all as will hereinafter be more fully dethe fibres are shown as having been pulled off scribed, and the novel features thereof particuone side of the fabric to expose fibres projected larly pointed out in the appended claims. through from the other side of the fabric, as in- In the accompanying drawing dicated at M. Thus, the layer of fibres on each Figure 1 is a perspective view of an abrading side of the fabric becomes attached to the fabric member commonly known in the industry as a, and, in addition, these tufts of fibres that are pad; engaged by the needles in this so-called needling Fig. 2 is a perspective view of a section of the operation tend to interlock the fibres of each web material of which the abrading member is layer, so that there is little, if any, likelihood of 5 composed; and the web rupturing or breaking or disintegrating instance, latex cement, either before or after being laminated and, after being laminated in pad form, they are placed under heat and pressure for curing and to reduce them to the desired density. j

It has been found that the use of this reinforcing member in the pad, or rather in the laminations constituting the pad, allows consider-" able flexing of the pad in use, without undue..,

permanent deformation or excess fatigue or wear on the pad. In addition, particularly where a canvas reinforcing member, is used in the laminations, the sameconstitutes strengthening means against centrifugal forces which are set up in the use of the wheel, it .being remembered that the wheel is rotated at'considerable speed in the abrading operation. 'Also, the presence of the reinforcing fabric, with the fibres extending therethrough from opposite sides thereof, also aidslinz resisting centrifugal action, supplementing the binding action of the binder used in uniting the several laminations and fibres constituting the same. Again, this tying together of the fibres themselves and the fibres to the reinforcing fabric by the so-called needling operation, tends 'to, securely interlock them. This feature is'not only of importance so faras the life of the finished pad is concerned, but it also greatly facilitates handling of the web of fibres in the production of the blanks and the handling of the blanks in laminating them to form the pad.

This is especially true where all these steps are,

performed before. application of :the binder to the fibres. L

It will be appreciated that, while a pad only is illustrated in connection with the disclosure of the present invention, the same is not limited to this specific use, as it lends to the production of abrading wheels of increased strength and wear,- ing properties. Neither-isthe invention limited to the use of any particular type of fibre, although a vegetable fibre and a fabric reinforcing material is preferred.

What I claim is:

1. A circular disc-like body for anxabrading member composed of a plurality of laminations of fibres, each lamination having a reinforcing member therein with portions of the fibres of the lamination projecting through said reinforcing member, and a binder securing said laminations in a unitary mass.

.2. A disc-like body for an abrading member composed of a plurality of laminations of fibres, each lamination having a fabric reinforcing member extending therethrough with the fibres of the lamination projecting through said fabric, anda binder uniting said laminations in a unitary mass.

3. A :disc-likebody for an abrading member comprising a lamination consisting essentially of a sheet of reinforcing material and a layer of promiscuously disposedfibres covering the side surface of said sheet with portions of the fibres projecting through'said sheet, and a binder uniting saidfibres and reinforcing sheet in a unitary mass.

4. 'A disc-like body for an abrading member adapted to flex laterally,-said body being composed of a plurality of laminations, each lamination consistingessentially of a sheet of reinforcingfabrie and a layer of fibres covering the side surface of the fabric with groups of the fibres projecting through the reinforce fabric, and a binderuniting the several laminations in a unitary mass.

p -5. A disc-like body for 'an abrading member adapted to fiex laterally, said body comprising a lamination composed of vegetable fibres with a sheet of reinforcing material embedded therein,the.fibres being attached to said sheet by projecting therethrough: from opposite sides thereof, and a binder uniting said laminations in a unitary mass. V

6. Aadisc-like body for an abrading member adapted to ,flex laterally, said body comprising a-lamination formed of a fabric sheet with a layer offibres oneachsidethereof, groups of the fibres of each layer being disposed transversely of the layer and projecting through said fabric sheet, and a binder uniting 'said fibres and fabric in a unitary mass.

-. KENNETH H. BOWEN. 

